The automatic temperature system with fuzzy self-adaptive PID control in semiconductor laser

Introduce a precision fuzzy self-adaptive PID control system in semiconductor laser. Output wavelength of semiconductor laser has temperature drift with temperature changing. It affects semiconductor laser accuracy and service life. In order to enable the semiconductor laser work stably, maintain its temperature stability, design this system using MATLAB Toolbox. Adjusting effect of temperature system in real test is applied for testing the temperature control system. Experimental results show that using fuzzy self-adaptive PID control improves the dynamic response and raises the steady-state precision of laser diode temperature control system. When the environment temperature is 16degC, the over-shoot under this fuzzy control of self-adaptive PID controller is less than 1.6% of this under PID controller, the regulation time reduced 2.5s, the control accuracy of fuzzy self-adaptive PID control is 0.005degC.